MBR membrane assembly and MBR membrane bioreactor

Abstract

The present invention relates to the field of MBR membrane technology, and in particular to an MBR membrane assembly and an MBR membrane bioreactor. The present invention comprises a shell, wherein the shell is fixedly connected with an equidistantly arranged first plate and an equidistantly arranged second plate, wherein a first cavity is arranged in the first plate, and a first fixed plate arranged equidistantly is fixedly connected to a side of the second plate adjacent to the first plate, wherein the first plate is rotatably connected with an equidistantly arranged second fixed plate, wherein the second fixed plate is connected to a first cavity adjacent to the first plate, and uniformly arranged membrane filaments are fixedly connected between the first fixed plate and the adjacent second fixed plate. The present invention drives the adjacent membrane filaments to deflect by the second fixed plate, so that the adjacent membrane filaments scrape against each other during the working process, thereby removing impurities adhered to the outside of the membrane filaments, and allowing the membrane filaments to automatically remove impurities adhered to their surfaces during the working process, thereby avoiding a reduction in processing efficiency caused by shutdown when cleaning the membrane filaments.

Description

Technical Field

[0001] The invention relates to the technical field of MBR membranes, and in particular to an MBR membrane component and an MBR membrane bioreactor. Background Art

[0002] MBR membrane bioreactor is a combined sewage (wastewater) treatment device that combines traditional membrane separation and biological treatment. The MBR membrane assembly in the MBR membrane bioreactor is an important component and is responsible for solid-liquid separation. The important component of the MBR membrane assembly is the membrane filament, so whether the membrane filament operates normally directly determines the sewage treatment effect of the MBR membrane bioreactor. However, as the working time of the membrane filament in the MBR membrane assembly increases, separated impurities will adhere to the outside of the membrane filament, and these impurities will affect the normal operation of the membrane filament, so the membrane filament needs to be cleaned regularly.

[0003] After working for a period of time, the existing MBR membrane components need to be cleaned to remove impurities adhering to the surface of the membrane fibers and ensure the normal filtering function of the membrane fibers. However, the existing technology requires stopping the treatment of sewage when cleaning the membrane fibers, and the cleaning of the membrane fibers usually takes a certain period of time, which seriously reduces the efficiency of sewage treatment. Summary of the invention

[0004] In order to overcome the shortcomings mentioned in the above technical background, the present invention provides an MBR membrane assembly and an MBR membrane bioreactor.

[0005] The technical solution of the present invention is: an MBR membrane assembly, comprising a shell, wherein the shell is fixedly connected with a first plate and a second plate arranged at an equal distance, wherein a first cavity is arranged in the first plate, and a first fixed plate arranged at an equal distance is fixedly connected to a side of the second plate adjacent to the first plate, wherein the first plate is rotatably connected with a second fixed plate arranged at an equal distance, wherein the second fixed plate is communicated with a first cavity of the adjacent first plate, wherein uniformly arranged membrane filaments are fixedly connected between the first fixed plate and the adjacent second fixed plate, wherein the membrane filaments are communicated with the adjacent second fixed plate, wherein the second fixed plate is fixedly connected with a fixing ring, wherein the fixing ring is connected to the first cavity of the adjacent first plate The adjacent first plates are slidably connected, the fixing ring is fixed with a limiting rod, the limiting rod is provided with a first groove, the equidistantly arranged first plates are slidably connected with a cross bar, the first plate is slidably connected with a first sliding rod, the first sliding rod is fixed with the cross bar, the first sliding rod is provided with equidistantly arranged first protrusions, the first groove of the limiting rod is limitedly matched with the adjacent first protrusion on the adjacent first sliding rod, a pump body is installed in the shell, the first cavities on the equidistantly arranged first plates are commonly connected with a central pipe connected with the pump body, and a power mechanism for moving the cross bar is provided on the outside of the shell.

[0006] As a preferred technical solution of the present invention, the power mechanism includes a first motor, the first motor is installed in the shell, the output shaft of the first motor is fixedly connected to the first gear, the shell is rotatably connected to the first rotating shaft through the first bracket, the first rotating shaft one end close to the first gear is fixedly connected to the second gear, the second gear is meshed with the first gear, the shell is rotatably connected to the second rotating shaft through the second bracket, the second rotating shaft and the first rotating shaft are connected through a bevel gear set transmission connection, the second rotating shaft is fixedly connected to the first rotating shaft at one end away from the first rotating shaft, the rotating disk is fixedly connected to the second protrusion at the eccentric point away from the bevel gear set, the first sliding rod close to the rotating disk is fixedly connected to a limiting frame, the limiting frame is provided with a second groove, the second groove of the limiting frame is limitedly matched with the second protrusion of the rotating disk, and a blowing assembly for blowing the evenly arranged membrane filaments is provided in the shell.

[0007] As a preferred technical solution of the present invention, the blowing assembly includes an air pump, which is installed on the side of the shell near the first motor. A movable frame is slidably connected to the side of the shell near the central pipe. An air passage is provided in the movable frame. The movable frame is provided with evenly arranged through holes. The through holes of the movable frame are connected to the air passage, and an intermediate pipe is connected between the air passage and the air pump.

[0008] As a preferred technical solution of the present invention, a side of the shell close to the cross bar is rotatably connected to a reciprocating screw, a side of the moving frame close to the reciprocating screw is installed with a fixed block, the fixed block of the moving frame is threadedly connected to the reciprocating screw, a side of the shell away from the reciprocating screw is fixedly connected to a guide rod, the guide rod is slidably connected to the moving frame, a side of the reciprocating screw close to the first motor is fixedly connected to a third gear, an output shaft of the first motor is fixedly connected to a fourth gear, and the fourth gear is meshed with the third gear.

[0009] The present invention also provides an MBR membrane bioreactor, wherein a staircase is installed on the side of the shell away from the first motor, a cover plate is rotatably connected to the side of the shell close to the first motor and is evenly arranged, a protective shell is installed on the side of the shell close to the first motor, and the protective shell covers the first motor and parts thereon, a cover shell is connected to the side of the shell away from the pump body, the cover shell is provided with a liquid inlet channel, and a liquid outlet channel is provided on the side of the shell away from the cover shell, a first filter plate is fixedly connected in the cover shell, and an extrusion mechanism for extruding impurities is provided in the cover shell.

[0010] As a preferred technical solution of the present invention, the extrusion mechanism includes symmetrically arranged vertical plates, the symmetrically arranged vertical plates are all fixedly connected to the cover shell, the vertical plates are fixedly connected to the first filter plate, a second cavity is arranged between the vertical plates and the cover shell, the cover shell is slidably connected to two extrusion plates and two second sliding rods, the extrusion plates slidably cooperate with adjacent said vertical plates, the second sliding rods are fixedly connected to adjacent said extrusion plates, a symmetrically arranged second filter plate is fixedly connected in the cover shell, the second filter plate connects the shell and the adjacent second cavity, the second filter plate is located in the adjacent second cavity of the cover shell, the second filter plate is fixedly connected to the adjacent said vertical plates, two sliding plates are slidably connected in the cover shell, the sliding plates are slidably connected to the adjacent second filter plates and adjacent said vertical plates, and a power component for causing the cover shell and the two extrusion plates to move relative to each other is provided on the outside of the cover shell.

[0011] As a preferred technical solution of the present invention, the power assembly includes a second motor, the second motor is installed on the outer side of the cover shell through a mounting bracket, the output shaft of the second motor is fixedly connected to a rotating plate, the eccentric part of the rotating plate is fixedly connected to a third protrusion, the cover shell is rotatably connected to a fifth gear through a support plate on one side close to the second motor, the fifth gear is fixedly connected to a connecting plate, the cover shell is slidably connected to a rack through the support plate, the rack is provided with a third groove, the third groove of the rack is limitedly matched with the third protrusion of the rotating plate, the rack is meshed with the fifth gear, the end of the second sliding rod away from the adjacent sliding plate is fixedly connected to a connecting rod, the connecting rod is rotatably connected to the eccentric part of the connecting plate, and an opening cover assembly for causing the two sliding plates to move relative to the adjacent vertical plates is provided on the outer side of the cover shell.

[0012] As a preferred technical solution of the present invention, the cover opening assembly includes two first sliding bars, both of which are slidably connected to the cover shell, and the first sliding bar is fixedly connected to a connecting piece at one end close to the adjacent sliding plate, and the connecting piece is rotatably connected to the first rotating piece, and the first rotating piece is fixedly connected to the adjacent sliding plate, and the back sides of the two first rotating pieces are fixedly connected to a first limiting plate, and a symmetrically arranged first elastic element is fixedly connected between the first rotating piece and the adjacent connecting pieces, and the cover shell is fixedly connected to a symmetrically arranged second limiting plate, and the second limiting plate is limitedly cooperated with the adjacent first limiting plate, and the opposite sides of the symmetrically arranged second limiting plates are provided with straight surfaces and inclined surfaces, and the outer side of the cover shell is provided with a transmission assembly for making the two first sliding bars move relative to the adjacent vertical plates respectively.

[0013] As a preferred technical solution of the present invention, the transmission assembly includes two second sliding bars, both of which are slidably connected to the outer side of the cover shell, the second sliding bar is fixedly connected to the adjacent second sliding bar, the second sliding bar is fixedly connected to a first limit piece at one end close to the adjacent first sliding bar, the cover shell is fixedly connected to a symmetrically arranged first limit block, the first sliding bar is rotatably connected to the second rotating member at one end close to the adjacent second sliding bar, the second rotating member is fixedly connected to a second limit piece on one side close to the adjacent second sliding bar, the second limit piece is limitedly cooperated with the adjacent first limit piece, the opposite sides of the two second rotating members are fixedly connected to second limit blocks, the second limit block is limitedly cooperated with the adjacent first limit block, a second elastic element is fixedly connected between the second rotating member and the adjacent first sliding bar, and a third elastic element is fixedly connected between the first sliding bar and the cover shell.

[0014] As a preferred technical solution of the present invention, the first limiting member and the second limiting member are both provided with an annular array of inclined surfaces for enabling the first limiting member and the adjacent second limiting member to rotate relative to each other.

[0015] Compared with the prior art, the present invention has at least the following effects: the present invention drives a plurality of adjacent membrane filaments to deflect through the second fixed plate, so that adjacent membrane filaments scrape each other during operation, thereby removing impurities adhered to the outer side of the membrane filaments, and allowing the membrane filaments to automatically remove impurities adhered to their surfaces during operation, thereby avoiding a reduction in treatment efficiency caused by shutdown when cleaning the membrane filaments; using an up-and-down moving frame to change the area where the air first contacts the sewage in the shell, so that fresh air provides uniformly distributed oxygen to organisms in various parts of the sewage, preventing air from continuously blowing into the sewage at the same position all the time, so that when the air moves to other areas, the oxygen contained therein has been consumed, resulting in different treatment states of the sewage at various places, and different working pressures of the membrane filaments at various places, affecting the normal treatment of the sewage; Impurities in the sewage are intercepted by the first filter plate, so that only fluid sewage enters the shell, which prevents impurities from affecting the organisms in the sewage and reducing the activity of the organisms, thereby reducing the sewage treatment effect. At the same time, it prevents impurities from damaging the membrane fibers, causing the membrane fibers to lose their filtering effect and affecting normal sewage treatment; the impurities in the adjacent second chambers are squeezed in batches by using the extrusion plates that move up and down alternately, so as to ensure that there is always a second chamber to receive impurities in the sewage, and avoid impurities accumulating and clogging on the first filter plate, thereby reducing the flow of sewage and reducing the efficiency of sewage treatment; the adjacent first limiting plate is limited by the second limiting plate, so that the adjacent sliding plate is deflected, so that the impurities squeezed on the sliding plate are automatically excluded from the device, thereby reducing the workload of subsequent staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0017] Figure 2 It is a three-dimensional structural schematic diagram of the housing and its internal parts of the present invention;

[0018] Figure 3 It is a schematic diagram of the three-dimensional structure when the first gear and the second gear are meshed with each other in the present invention;

[0019] Figure 4 It is a three-dimensional structural cross-sectional view of the first plate and the movable frame of the present invention;

[0020] Figure 5 It is a schematic diagram of the three-dimensional structure of the first plate of the present invention when it slides relatively with the adjacent first sliding rod;

[0021] Figure 6 It is a three-dimensional structural exploded diagram of the first plate and the parts thereon of the present invention;

[0022] Figure 7 It is a three-dimensional structural exploded diagram of the reciprocating screw and its parts of the present invention;

[0023] Figure 8 It is a three-dimensional structural schematic diagram of the cover shell and the parts thereon of the present invention;

[0024] Fig. 9 It is a schematic diagram of the three-dimensional structure of the cover shell and the extrusion plate of the present invention when they slide relative to each other;

[0025] Fig.10 It is a schematic diagram of the three-dimensional structure of the connecting plate of the present invention when it rotates;

[0026] Fig.11 It is a three-dimensional structural schematic diagram of the first sliding rod and parts thereon of the present invention;

[0027] Fig.12 It is a three-dimensional structural exploded view of the first sliding rod and the parts thereon of the present invention.

[0028] Markings in the figure are: 1-shell, 2-first plate, 3-second plate, 4-first fixed plate, 5-second fixed plate, 6-membrane wire, 7-fixing ring, 8-limiting rod, 9-cross bar, 1001-first sliding rod, 1002-pump body, 1003-concentrating pipe, 1101-first motor, 1102-first gear, 1103-first rotating shaft, 1104-second gear, 1105-second rotating shaft, 1106-bevel gear set, 1107-rotating disk, 1108-limiting frame, 1201-air pump, 1202-moving frame, 1203-air passage, 1204-middle tube, 1301-reciprocating screw, 1302-guide rod, 1303-third gear, 1304-fourth gear, 1401-stairs, 1402-cover plate, 1403-protective shell, 140 4-cover shell, 1405-first filter plate, 1501-vertical plate, 1502-extrusion plate, 1503-second sliding rod, 1504-second filter plate, 1505-sliding plate, 1601-second motor, 1602-rotating plate, 1603-fifth gear, 1604-connecting plate, 1605-rack, 1606-connecting rod, 1701-first sliding rod, 1702-connecting member, 1703-first rotating member, 1704-first limiting plate, 1705-first elastic element, 1706-second limiting plate, 1801-second sliding rod, 1802-first limiting member, 1803-first limiting block, 1804-second rotating member, 1805-second limiting member, 1806-second limiting block, 1807-second elastic element, 1808-third elastic element. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention.

[0030] After the existing MBR membrane components have been used for a period of time, impurities will adhere to the outside of the membrane fibers. When cleaning the membrane fibers, it is necessary to stop the sewage treatment, and the cleaning of the membrane fibers takes a certain amount of time, so the sewage treatment efficiency is reduced.

[0031] Example 1: A MBR membrane assembly, such as Figure 1-Figure 6As shown, it includes a shell 1, a water storage chamber is provided in the right part of the shell 1, four first plates 2 arranged equidistantly are fixedly connected to the upper part of the shell 1, four second plates 3 arranged equidistantly are fixedly connected to the lower part of the shell 1, the upper and lower adjacent first plates 2 and second plates 3 are located in the same vertical area, a first cavity is provided in the first plate 2, seven (the numbers only relate to the specific implementation manner in this embodiment and cannot be used as a factor to limit the present application) first fixed plates 4 arranged equidistantly are fixedly connected to the upper side of the second plate 3, seven second fixed plates 5 arranged equidistantly are rotatably connected to the lower part of the first plate 2, the upper and lower adjacent first fixed plates 4 and second fixed plates 5 are located in the same vertical area, the second fixed plate 5 is connected to the first cavity of the adjacent first plate 2, a number of evenly arranged membrane threads 6 are fixedly connected between the first fixed plate 4 and the adjacent second fixed plate 5, the membrane threads 6 are used for solid-liquid separation of sewage, the membrane threads 6 are connected to the adjacent second fixed plates 5, the second fixed plate 5 is fixedly connected to a fixing ring 7 slidably connected to the adjacent first plate 2, and the right rear side of the fixing ring 7 is fixedly connected to The limiting rod 8 is provided with a first groove, which is a straight groove. The rear parts of the seven first plates 2 are slidably connected with a cross bar 9. The right part of the first plate 2 is slidably connected with a first sliding rod 1001 fixed to the cross bar 9. The lower side of the first sliding rod 1001 is provided with seven first protrusions arranged equidistantly. The first groove of the limiting rod 8 is limitedly matched with the adjacent first protrusion on the adjacent first sliding rod 1001. The adjacent first groove is squeezed by the first protrusion, so that the adjacent limiting rod 8 is deflected, thereby The adjacent second fixed plate 5 is deflected, and then the adjacent membrane filaments 6 are deflected, so that the adjacent membrane filaments 6 are scraped relative to each other, and the impurities adhered to the outside of the membrane filaments 6 due to the separation effect are removed, thereby ensuring the filtering capacity of the membrane filaments 6 and improving the efficiency of sewage treatment. A pump body 1002 is installed in the water storage chamber in the shell 1, and the first cavities on the seven first plates 2 are commonly connected to a central pipe 1003 connected to the pump body 1002, and a power mechanism for moving the cross bar 9 is provided on the right part outside the shell 1.

[0032] like Figure 2 , Figure 3 and Figure 7As shown, the power mechanism includes a first motor 1101, which is installed at the right rear part of the upper side of the housing 1, and the output shaft of the first motor 1101 is fixedly connected to a first gear 1102. The right rear part of the housing 1 is rotatably connected to a first rotating shaft 1103 through a first bracket, and the upper end of the first rotating shaft 1103 is fixedly connected to a second gear 1104 meshing with the first gear 1102. The upper right part of the rear side of the housing 1 is rotatably connected to a second rotating shaft 1105 through a second bracket, and the second rotating shaft 1105 and the first rotating shaft 1103 are connected through a bevel gear set. 1106 transmission connection, the right end of the second rotating shaft 1105 is fixedly connected with a rotating disk 1107, and a second protrusion is fixedly connected to the rear eccentric part of the right side of the rotating disk 1107, and the rear end of the first sliding rod 1001 on the right side is fixedly connected with a limit frame 1108, and the limit frame 1108 is provided with a second groove, and the second groove is a vertical groove. The second groove of the limit frame 1108 is limitedly matched with the second protrusion of the rotating disk 1107, and the second groove is squeezed by the second protrusion to move the limit frame 1108 forward and backward, and a blowing assembly for blowing a plurality of membrane filaments 6 is provided in the shell 1.

[0033] like Figure 2-Figure 5 As shown, the blowing assembly includes an air pump 1201, which is installed at the middle and rear part of the upper side of the shell 1. The right part inside the shell 1 is slidably connected with a moving frame 1202, and an air passage 1203 is arranged in the moving frame 1202. The moving frame 1202 is provided with a plurality of groups of through holes that are evenly arranged, and each group contains two through holes that are symmetrically arranged, and there is an angle between the axes of two adjacent through holes, which is used to blow adjacent membrane filaments 6 in different directions. The through holes of the moving frame 1202 are connected to the air passage 1203 thereon, and an intermediate tube 1204 is connected between the air passage 1203 and the air pump 1201.

[0034] like Figure 2-Figure 5 and Figure 7 As shown, the rear portion of the shell 1 is rotatably connected to a reciprocating screw 1301, the rear portion of the inner side of the moving frame 1202 is provided with a fixed block threadedly connected to the reciprocating screw 1301, the front portion of the shell 1 is fixedly connected to a guide rod 1302 slidably connected to the moving frame 1202, the upper end of the reciprocating screw 1301 is fixedly connected to a third gear 1303, and the output shaft of the first motor 1101 is fixedly connected to a fourth gear 1304 meshing with the third gear 1303.

[0035] When the present invention is needed to treat sewage, the staff first places the whole in an area of ​​the existing MBR membrane bioreactor where activated sludge is provided, wherein the activated sludge is filled with a large number of aerobic microorganisms for decomposing organic matter in the sewage. Then the staff pours the sewage into the area where several membrane fibers 6 are located in the shell 1 (the area where the activated sludge exists). The microorganisms in the area biologically treat the sewage and decompose the impurities in the sewage. Then the staff starts the pump body 1002, and the pump body 1002 works and generates negative pressure in the central pipe 1003 (then negative pressure is generated in the first cavity of the first plate 2 and in the membrane fiber 6). The sewage outside the membrane fiber 6 is attracted and begins to move into the adjacent membrane fiber 6. During the process, the decomposed impurities in the sewage are separated by the adjacent membrane fiber 6. Subsequently, the biologically treated water (for ease of understanding, the following uses clean water instead) passes through the adjacent membrane fiber 6 and enters the first cavity of the adjacent first plate 2. Then the clean water passes through the central pipe 1003 and the pump body 1002 and enters the water storage chamber of the shell 1. Finally, the staff discharges and collects the clean water in the water storage chamber of the shell 1.

[0036] When treating sewage, the staff starts the first motor 1101, and the output shaft of the first motor 1101 begins to rotate clockwise (looking down), and the output shaft of the first motor 1101 drives the first gear 1102 to rotate clockwise, and the first gear 1102 drives the second gear 1104 to rotate counterclockwise, and the second gear 1104 drives the first rotating shaft 1103 to rotate counterclockwise, and the first rotating shaft 1103 drives the second rotating shaft 1105 to rotate clockwise through the bevel gear set 1106 (looking right), and the second rotating shaft 1105 drives the rotating disk 1107 to rotate clockwise, and the second protrusion of the rotating disk 1107 begins to slide in the second groove of the limit frame 1108, and at the same time, the second protrusion of the rotating disk 1107 squeezes the limit frame 1108 forward, and then the limit frame 1108 begins to move forward, and the limit The frame 1108 drives the first sliding rod 1001 to move forward together, and the first protrusion of the first sliding rod 1001 begins to slide in the first groove of the adjacent limiting rod 8. At the same time, the first protrusion of the first sliding rod 1001 squeezes the adjacent limiting rod 8 forward, and the limiting rod 8 begins to deflect clockwise (looking down), and the limiting rod 8 drives the adjacent second fixing plate 5 to deflect clockwise through the adjacent fixing ring 7. The second fixing plate 5 drives several adjacent membrane threads 6 to deflect together. Since the lower end of the membrane thread 6 is fixed by the adjacent first fixing plate 4, the membrane thread 6 begins to twist. During the twisting process of the membrane thread 6, the adjacent membrane threads 6 scrape against each other, thereby removing impurities adhered to the outside of the membrane thread 6, so that the membrane thread 6 automatically removes impurities adhered to its surface during operation, thereby avoiding the reduction of processing efficiency caused by shutdown when cleaning the membrane thread 6.

[0037] During the clockwise rotation of the rotating disk 1107, when the second protrusion of the rotating disk 1107 rotates clockwise to the frontmost side, the first sliding rod 1001 moves forward to the extreme position, that is, the relative deflection angle between the second fixed plate 5 and the adjacent first fixed plate 4 reaches the maximum value, as the rotating disk 1107 continues to rotate clockwise, the second protrusion of the rotating disk 1107 begins to squeeze the limit frame 1108 backward, and the limit frame 1108 drives the first sliding rod 1001 to move backward together, and the first protrusion of the first sliding rod 1001 drives the adjacent limit rod 8 to start deflecting counterclockwise, and the limit rod 8 drives the adjacent second fixed plate 5 to deflect counterclockwise through the adjacent fixing ring 7, and the second fixed plate 5 drives several adjacent membrane filaments 6 to start resetting until the membrane filament 6 returns to its original state, and such a cyclic motion is carried out to ensure the cleanliness of the outside of the membrane filament 6, thereby improving the water filtration efficiency.

[0038] In order to improve the treatment effect and efficiency of sewage, each area of ​​the membrane filament 6 in the vertical direction is evenly aerated through the up and down reciprocating moving frame 1202, so that the activity of the organisms in each area is relatively uniform, avoiding too low or too high activity of the organisms in the local area, which leads to different working intensities in different parts of the membrane filament 6, and thus different degrees of impurity accumulation in different parts of the membrane filament 6, affecting normal water filtration. The specific steps are as follows. When treating sewage, the staff starts the air pump 1201, and the air pump 1201 blows air into the middle pipe 1204. The air enters the air channel 1203 through the middle pipe 1204, and finally enters the shell 1 through the through hole on the moving frame 1202. Then the air contacts the organisms in the sewage, thereby providing the organisms with oxygen required for metabolism, improving the activity of the organisms, and thus improving the treatment effect and efficiency of sewage.

[0039] During the clockwise rotation of the output shaft of the first motor 1101, the output shaft of the first motor 1101 drives the fourth gear 1304 to rotate clockwise, the fourth gear 1304 drives the third gear 1303 to rotate counterclockwise, and the third gear 1303 drives the reciprocating screw 1301 to rotate counterclockwise, and then the rotating reciprocating screw 1301 drives the fixed block of the moving frame 1202 to start moving downward, that is, the moving frame 1202 starts to move downward, and the downward moving frame 1202 changes the first contact area between the air and the sewage in the shell 1, and in the process of the moving frame 1202 moving downward, the air also blows the adjacent membrane wire 6, so as to further clean the membrane wire 6. This ensures the normal progress of the water filtration work. By changing the first contact area between air and sewage, the sewage is evenly contacted with the air at all locations, preventing the air from being continuously blown into the sewage at the same position. As a result, when the air moves to other areas, the oxygen contained in it has been consumed, resulting in different treatment states of the sewage at different locations, and different working pressures of the membrane filament 6 at different locations, affecting the normal treatment of the sewage. When the moving frame 1202 moves downward to the extreme position, as the reciprocating screw 1301 continues to rotate counterclockwise, the moving frame 1202 starts to move upward, and this continues until all the sewage has been treated, and the staff can then turn off the pump body 1002, the first motor 1101 and the air pump 1201.

[0040] The existing MBR membrane bioreactor only performs simple pretreatment on sewage, such as filtering and removing impurities, but there is no subsequent treatment for the large impurities obtained after filtering the sewage. The large impurities filtered out from the sewage also adsorb the sewage. The subsequent treatment of such large impurities brings great difficulties to the staff.

[0041] Embodiment 2: The present invention also provides a MBR membrane bioreactor, such as Figure 1 , Figure 2 and Figure 8-Figure 10 As shown, a staircase 1401 is installed on the front side of the shell 1 to facilitate the inspection and observation of the staff. The upper side of the shell 1 is rotatably connected with a number of evenly arranged cover plates 1402 to isolate the external environment and facilitate the staff to observe the treatment status of the sewage. A protective shell 1403 is installed on the right rear part of the upper side of the shell 1, and the protective shell 1403 covers the first motor 1101 and the parts thereon. The upper part of the left side of the shell 1 is connected with a cover shell 1404, and a liquid inlet channel is provided on the left side of the cover shell 1404, and the liquid inlet channel is connected to the external sewage pipe. A liquid outlet channel is provided on the upper part of the right side of the shell 1, and a first filter plate 1405 is fixedly connected in the cover shell 1404. The first filter plate 1405 is arc-shaped, and the middle part of the first filter plate 1405 is higher than the front and rear sides. An extrusion mechanism for extruding impurities is provided in the cover shell 1404.

[0042] like Figure 8-Figure 11As shown, the extrusion mechanism includes two vertical plates 1501 arranged symmetrically front and back, the two vertical plates 1501 are fixedly connected to the housing 1404, the vertical plates 1501 are fixedly connected to the first filter plate 1405, a second cavity is provided between the vertical plates 1501 and the housing 1404, the housing 1404 is slidably connected with two front and rear extrusion plates 1502 and two front and rear second sliding rods 1503, the cross section of the extrusion plate 1502 is L-shaped, the vertical areas of the two extrusion plates 1502 are located between the two second sliding rods 1503, and are used to block impurities in adjacent areas to prevent impurities on the first filter plate 1405 from moving to the top of the extrusion plate 1502 during the extrusion of impurities, the extrusion plate 1502 is slidably matched with the adjacent vertical plates 1501, and the second sliding rods 1503 are fixedly connected to the adjacent extrusion plates 1502 Two front and rear second filter plates 1504 are fixedly connected in the cover shell 1404, and the second filter plate 1504 connects the shell 1 and the adjacent second cavity. The second filter plate 1504 is located in the second cavity adjacent to the cover shell 1404, and the second filter plate 1504 is fixedly connected to the adjacent vertical plate 1501. Two front and rear sliding plates 1505 are slidably connected in the cover shell 1404, and the sliding plate 1505 is slidably connected to the adjacent second filter plate 1504 and the adjacent vertical plate 1501. The relative movement between the extrusion plate 1502 and the adjacent sliding plate 1505 is utilized to squeeze the impurities between the two, so as to discharge the sewage adsorbed in the impurities and reduce the work intensity of the subsequent staff. The upper side of the cover shell 1404 is provided with a power component for making the cover shell 1404 and the two extrusion plates 1502 move relative to each other.

[0043] like Figure 8-Figure 10 As shown, the power assembly includes a second motor 1601, which is mounted on the upper side of the housing 1404 through a mounting frame, the output shaft of the second motor 1601 is fixedly connected to a rotating plate 1602, a third protrusion is fixedly connected to the front eccentric portion of the right side of the rotating plate 1602, the upper side of the housing 1404 is rotatably connected to a fifth gear 1603 through a support plate, the right side of the fifth gear 1603 is fixedly connected to a connecting plate 1604, the housing 1404 is slidably connected to a rack 1605 meshing with the fifth gear 1603 through a support plate, and the rack 1605 is provided with a third groove which cooperates with the third protrusion of the rotating plate 1602. The third groove is a vertical groove. The third protrusion is used to squeeze the third groove to make the rack 1605 move back and forth. The upper end of the second sliding rod 1503 is fixed with a connecting rod 1606. The connecting rod 1606 is an elastic telescopic rod. The connecting rod 1606 is rotatably connected to the front eccentric part of the connecting plate 1604. The outer side of the cover shell 1404 is provided with an opening component for making the two sliding plates 1505 move relative to the adjacent vertical plates 1501 respectively.

[0044] like Figure 9-12As shown, the cover opening assembly includes two front and rear first sliding rods 1701, the two first sliding rods 1701 are slidably connected to the outer side of the cover shell 1404, the lower end of the first sliding rod 1701 is fixedly connected to a connecting member 1702, the upper side of the connecting member 1702 is rotatably connected to a first rotating member 1703 fixedly connected to the adjacent sliding plate 1505, the back sides of the two first rotating members 1703 are fixedly connected to a first limiting plate 1704, and two first elastic elements 1705 arranged symmetrically on the left and right are fixedly connected between the first rotating member 1703 and the adjacent connecting member 1702, and the first elastic element 1705 is a torsion spring, which is used to reset the adjacent first rotating member 1703, and the cover shell 1 The lower side of 404 is fixed with two second limit plates 1706 which are symmetrically arranged front to back. The second limit plates 1706 cooperate with the adjacent first limit plates 1704 in a limiting manner. The opposite sides of the two second limit plates 1706 are provided with straight surfaces and inclined surfaces. The straight surfaces are vertical surfaces and are located on the upper side of the inclined surfaces, and the distance between the two inclined surfaces gradually decreases from top to bottom. The adjacent first limit plates 1704 are squeezed by the inclined surfaces of the two second limit plates 1706 respectively, so that the two first limit plates 1704 are deflected toward each other. The outer side of the cover shell 1404 is provided with a transmission component for making the two first sliding bars 1701 move relative to the adjacent vertical plates 1501 respectively.

[0045] like Figure 10-12As shown, the transmission assembly includes two second sliding bars 1801 at the front and rear ends, the two second sliding bars 1801 are slidably connected to the outer side of the cover 1404, the second sliding bars 1801 are fixedly connected to the adjacent second sliding bars 1503, the lower ends of the second sliding bars 1801 are fixedly connected to the first limiting member 1802, the cover 1404 is fixedly connected to two first limiting blocks 1803 symmetrically arranged at the front and rear ends, the upper end of the first sliding bar 1701 is rotatably connected to the second rotating member 1804, the upper side of the second rotating member 1804 is fixedly connected to the second limiting member 1805, and the first limiting member The first stopper 1802 and the second stopper 1805 are both provided with four inclined surfaces in an annular array. The deflection direction of the inclined surface of the first stopper 1802 and the inclined surface of the second stopper 1805 are both clockwise from top to bottom (in the top view direction), and the top end area of ​​the inclined surface of the first stopper 1802 coincides with the top end area of ​​the inclined surface of the adjacent second stopper 1805 in the axial direction of the adjacent first slide bar 1701. The inclined surface of the first stopper 1802 is pressed and matched with the adjacent inclined surface of the adjacent second stopper 1805. The inclined surface of the positioning member 1802 squeezes the adjacent inclined surface of the adjacent second limiting member 1805, so that the first limiting member 1802 and the adjacent second limiting member 1805 rotate relative to each other. The opposite sides of the two second rotating members 1804 are fixedly connected with the adjacent second limiting blocks 1806 that cooperate with the first limiting blocks 1803. The first limiting blocks 1803 are used to limit the adjacent second limiting blocks 1806, so that the sliding plate 1505 remains stationary during the process of squeezing impurities, and the second rotating member 1804 and the adjacent first sliding rod 170 1 is fixedly connected with a second elastic element 1807, the second elastic element 1807 is a torsion spring, and is used for resetting the adjacent second rotating member 1804; a third elastic element 1808 is fixedly connected between the first sliding bar 1701 and the cover shell 1404, the third elastic element 1808 is a spring, and is used for resetting the adjacent first sliding bar 1701, and the elastic coefficient of the third elastic element 1808 is greater than the elastic coefficient of the second elastic element 1807, and is used for moving the second limit block 1806 upward to pass the adjacent first limit block 1803 and then resetting.

[0046] In order to improve the treatment effect of sewage and reduce the work intensity of the staff, the impurities filtered out by the first filter plate 1405 are squeezed and automatically removed by the squeezing plate 1502 that moves up and down, so as to pre-treat the sewage and prevent large impurities in the sewage from damaging the membrane filament 6. The specific steps are as follows. When the sewage needs to be treated, the staff connects the external sewage pipe with the liquid inlet channel of the cover shell 1404, and then passes the sewage into the cover shell 1404. The sewage enters the shell 1 after passing through the first filter plate 1405. The sewage reaches the area of ​​the membrane filament 6 after passing through the regulating tank in the shell 1, and then undergoes biological treatment. In the process of the sewage passing through the first filter plate 1405, the impurities in the sewage are intercepted, and then begin to move downward along the upper side of the first filter plate 1405 under the action of the gravity of the impurities and the impact of the water flow, and the impurities finally enter the second cavity of the cover shell 1404.

[0047] When sewage enters the cover shell 1404, the staff starts the second motor 1601, and the output shaft of the second motor 1601 begins to rotate clockwise (left viewing direction), and the output shaft of the second motor 1601 drives the rotating plate 1602 to rotate clockwise together, and the third protrusion of the rotating plate 1602 begins to squeeze the rack 1605 backwards, and at the same time, the third protrusion of the rotating plate 1602 begins to slide in the third groove of the rack 1605, and then the rack 1605 begins to move backward, and the rack 1605 drives the fifth gear 1603 to rotate clockwise, and the fifth gear 1603 drives the connecting plate 1604 to rotate clockwise together, and the clockwise rotating connecting plate 1604 begins to squeeze the connecting rod 1606 on the front side downward and squeeze the connecting rod 1606 on the rear side upward, and both connecting rods 1606 are compressed, and the connecting rod 1606 on the front side drives the second sliding The rod 1503 moves downward together, and the second sliding rod 1503 on the front side drives the squeezing plate 1502 on the front side to move downward together. The squeezing plate 1502 on the front side squeezes the impurities in the second cavity on the front side, so as to discharge the sewage adsorbed in the impurities, thereby ensuring the dryness of the impurities, reducing the difficulty of subsequent staff to deal with the impurities, and improving work efficiency. The squeezed sewage then enters the shell 1 through the second filter plate 1504 on the front side, and the connecting rod 1606 on the rear side drives the parts thereon to move upward together, so that the squeezing plate 1502 on the rear side gradually loses its blockage of the second cavity on the rear side, so as to alternately squeeze the impurities in the two second cavities, ensuring that there is always a second cavity receiving impurities in the sewage, avoiding the accumulation of impurities on the first filter plate 1405 to cause blockage, thereby reducing the flow of sewage and reducing the efficiency of sewage treatment.

[0048] As the second sliding rod 1503 moves downward, the second sliding rod 1503 drives the adjacent second sliding rod 1801 to move downward together, and the second sliding rod 1801 drives the adjacent first limiting member 1802 to move downward together. When the first limiting member 1802 moves downward until it contacts the adjacent second limiting member 1805, as the second sliding rod 1801 continues to move downward, the inclined surface on the first limiting member 1802 begins to squeeze the adjacent inclined surface on the adjacent second limiting member 1805, and then the second limiting member 1805 rotates, and the second limiting member 1805 drives the adjacent second rotating member 1804 and its The second limit block 1806 on the upper part rotates together, and the adjacent second elastic element 1807 is deformed. When the second limit block 1806 rotates to lose contact with the adjacent first limit block 1803, as the second slide bar 1801 continues to move downward, the first limit member 1802 drives the adjacent second rotating member 1804 to move downward through the adjacent second limit member 1805. During the process, the first limit member 1802 and the adjacent second limit member 1805 remain relatively still, the second rotating member 1804 drives the adjacent first slide bar 1701 to move downward, and the adjacent third elastic element 1808 is compressed.

[0049] During the downward movement of the first sliding rod 1701, the first sliding rod 1701 drives the adjacent connecting member 1702 to move downward together, the connecting member 1702 drives the adjacent first rotating member 1703 and the adjacent two first elastic elements 1705 to move downward together, the first rotating member 1703 drives the adjacent first limiting plate 1704 and the adjacent sliding plate 1505 to move downward together, the first limiting plate 1704 begins to slide downward along the straight surface of the adjacent second limiting plate 1706, and the sliding plate 1505 slides downward in the adjacent second cavity. When the sliding plate 1505 moves downward to disengage from the adjacent second cavity, the first limiting plate 1704 moves downward to the adjacent second cavity. In the inclined surface area of ​​the limiting plate 1706, as the first slide bar 1701 continues to move downward, the inclined surface of the second limiting plate 1706 begins to squeeze the adjacent first limiting plate 1704, and the first limiting plate 1704 begins to deflect in the direction away from the adjacent first slide bar 1701, and the first limiting plate 1704 drives the adjacent first rotating member 1703 to deflect together, and the first rotating member 1703 drives the adjacent sliding plate 1505 to deflect together, and the two adjacent first elastic elements 1705 are deformed, and then the impurities squeezed on the sliding plate 1505 move downward under the action of their own gravity until they slide down, so that the impurities are automatically excluded from the device, thereby reducing the workload of subsequent staff.

[0050] During the upward movement of the second slide bar 1801, the second slide bar 1801 drives the adjacent first limit member 1802 to move upward together, and the first limit member 1802 gradually loses the squeeze on the adjacent second limit member 1805. The first slide bar 1701 begins to move upward under the action of the elastic force of the adjacent third elastic element 1808, and the first slide bar 1701 drives the parts thereon to move upward together, and the first limit plate 1704 begins to slide upward on the inclined surface of the adjacent second limit plate 1706, and the inclined surface of the second limit plate 1706 gradually loses the squeeze on the adjacent first limit plate 1704. The first rotating member 1703 starts to reset under the action of the torque of the adjacent first elastic element 1705, and the first rotating member 1703 drives the adjacent sliding plate 1505 to reset together. As the first slide bar 1701 continues to move upward, when the first limiting member 1802 moves upward to be disengaged from the adjacent second limiting member 1805, the second rotating member 1804 starts to reset under the action of the torque of the adjacent second elastic element 1807 until all parts are reset. The sewage is continuously treated in this way until all the sewage is treated, and the staff can turn off the second motor 1601.

[0051] Those skilled in the art should understand that the above embodiments do not limit the present invention in any form, and any technical solutions obtained by equivalent replacement or equivalent transformation shall fall within the protection scope of the present invention.

Claims

1. An MBR membrane assembly, comprising a shell (1), wherein the shell (1) is fixedly connected with equidistantly arranged first plates (2) and equidistantly arranged second plates (3), wherein a first cavity is arranged in the first plate (2), and a first fixed plate (4) arranged equidistantly is fixedly connected to a side of the second plate (3) adjacent to the first plate (2), wherein the first plate (2) is rotatably connected with an equidistantly arranged second fixed plate (5), wherein the second fixed plate (5) is connected to a first cavity of the adjacent first plate (2), wherein uniformly arranged membrane filaments (6) are fixedly connected between the first fixed plate (4) and the adjacent second fixed plate (5), wherein the membrane filaments (6) are connected to the adjacent second fixed plate (5), wherein the MBR membrane assembly is characterized in that: The invention also comprises evenly arranged fixing rings (7), the evenly arranged fixing rings (7) are respectively fixed to the adjacent second fixing plates (5), the fixing rings (7) are slidably connected to the adjacent first plates (2), the fixing rings (7) are fixed to a limiting rod (8), the limiting rod (8) is provided with a first groove, the first plates (2) arranged at equal intervals are slidably connected to a cross bar (9), the first plates (2) are slidably connected to a first sliding rod (1001), the first sliding rod (1001) is connected to the first plate (2), and the first sliding rod (1001) is connected to the first plate (2). The cross bar (9) is fixedly connected, the first sliding bar (1001) is provided with first protrusions arranged at equal intervals, the first groove of the limiting rod (8) is limitedly matched with the first protrusions adjacent to the first sliding bar (1001), a pump body (1002) is installed in the shell (1), the first cavities on the first plate (2) arranged at equal intervals are commonly connected to a central pipe (1003) connected to the pump body (1002), and a power mechanism for moving the cross bar (9) is provided on the outer side of the shell (1); The power mechanism comprises a first motor (1101), the first motor (1101) being mounted on the housing (1), the output shaft of the first motor (1101) being fixedly connected to a first gear (1102), the housing (1) being rotatably connected to a first rotating shaft (1103) via a first bracket, one end of the first rotating shaft (1103) close to the first gear (1102) being fixedly connected to a second gear (1104), the second gear (1104) being meshed with the first gear (1102), the housing (1) being rotatably connected to a second rotating shaft (1105) via a second bracket, the second rotating shaft (1105) being in contact with the first rotating shaft (1103). The two rotating shafts (1105) are connected by a bevel gear set (1106); one end of the second rotating shaft (1105) away from the first rotating shaft (1103) is fixedly connected to a rotating disk (1107); a second protrusion is fixedly connected to an eccentric portion of the rotating disk (1107) away from the bevel gear set (1106); the first sliding rod (1001) close to the rotating disk (1107) is fixedly connected to a limit frame (1108); the limit frame (1108) is provided with a second groove; the second groove of the limit frame (1108) is limitedly matched with the second protrusion of the rotating disk (1107); and a blowing assembly for blowing the evenly arranged membrane filaments (6) is provided in the housing (1); The air blowing assembly comprises an air pump (1201), the air pump (1201) being mounted on a side of the shell (1) close to the first motor (1101), a movable frame (1202) being slidably connected to a side of the shell (1) close to the central pipe (1003), an air passage (1203) being provided in the movable frame (1202), the movable frame (1202) being provided with evenly arranged through holes, the through holes of the movable frame (1202) being in communication with the air passage (1203), and an intermediate pipe (1204) being in communication between the air passage (1203) and the air pump (1201).

2. The MBR membrane assembly according to claim 1, characterized in that: A reciprocating screw (1301) is rotatably connected to a side of the housing (1) close to the cross bar (9); a fixed block is installed on a side of the moving frame (1202) close to the reciprocating screw (1301); the fixed block of the moving frame (1202) is threadedly connected to the reciprocating screw (1301); a guide rod (1302) is fixedly connected to a side of the housing (1) away from the reciprocating screw (1301); the guide rod (1302) is slidably connected to the moving frame (1202); a third gear (1303) is fixedly connected to a side of the reciprocating screw (1301) close to the first motor (1101); a fourth gear (1304) is fixedly connected to an output shaft of the first motor (1101); and the fourth gear (1304) is meshed with the third gear (1303).

3. A MBR membrane bioreactor, characterized in that: The invention comprises an MBR membrane assembly as claimed in claim 2, wherein a staircase (1401) is installed on a side of the shell (1) away from the first motor (1101), a cover plate (1402) arranged evenly is rotatably connected to a side of the shell (1) close to the first motor (1101), a protective shell (1403) is installed on a side of the shell (1) close to the first motor (1101), the protective shell (1403) covers the first motor (1101) and parts thereon, a cover shell (1404) is connected to a side of the shell (1) away from the pump body (1002), the cover shell (1404) is provided with a liquid inlet channel, a side of the shell (1) away from the cover shell (1404) is provided with a liquid outlet channel, a first filter plate (1405) is fixedly connected to the cover shell (1404), and a squeezing mechanism for squeezing impurities is provided in the cover shell (1404).

4. A MBR membrane bioreactor according to claim 3, characterized in that: The extrusion mechanism comprises symmetrically arranged vertical plates (1501), the symmetrically arranged vertical plates (1501) are all fixedly connected in the housing (1404), the vertical plates (1501) are fixedly connected to the first filter plate (1405), a second cavity is arranged between the vertical plates (1501) and the housing (1404), the housing (1404) is slidably connected to two extrusion plates (1502) and two second sliding rods (1503), the extrusion plates (1502) are slidably matched with the adjacent vertical plates (1501), the second sliding rods (1503) are fixedly connected to the adjacent extrusion plates (1502), and the housing (1404) is fixedly connected with the symmetrically arranged second filter plates (1405). A filter plate (1504), wherein the second filter plate (1504) connects the shell (1) and an adjacent second cavity, the second filter plate (1504) is located in a second cavity adjacent to the cover shell (1404), the second filter plate (1504) is fixedly connected to the adjacent vertical plate (1501), two sliding plates (1505) are slidably connected inside the cover shell (1404), the sliding plate (1505) is slidably connected to the adjacent second filter plate (1504) and the adjacent vertical plate (1501), and a power component for causing the cover shell (1404) and the two extrusion plates (1502) to move relative to each other is provided on the outer side of the cover shell (1404).

5. A MBR membrane bioreactor according to claim 4, characterized in that: The power assembly comprises a second motor (1601), the second motor (1601) is mounted on the outside of the cover (1404) via a mounting frame, the output shaft of the second motor (1601) is fixedly connected to a rotating plate (1602), the eccentric portion of the rotating plate (1602) is fixedly connected to a third protrusion, a side of the cover (1404) close to the second motor (1601) is rotatably connected to a fifth gear (1603) via a support plate, the fifth gear (1603) is fixedly connected to a connecting plate (1604), the cover (1404) is slidably connected to a rack (1605) via a support plate, the rack (1605) is provided with a third groove, the third groove of the rack (1605) is limitedly matched with the third protrusion of the rotating plate (1602), the rack (1605) is meshed with the fifth gear (1603), the end of the second sliding rod (1503) away from the adjacent sliding plate (1505) is fixedly connected with a connecting rod (1606), the connecting rod (1606) is rotatably connected to the eccentric part of the connecting plate (1604), and the outer side of the cover shell (1404) is provided with a cover opening component for making the two sliding plates (1505) respectively move relative to the adjacent vertical plates (1501).

6. The MBR membrane bioreactor according to claim 5, characterized in that: The cover opening assembly comprises two first sliding rods (1701), the two first sliding rods (1701) are both slidably connected to the cover shell (1404), one end of the first sliding rod (1701) close to the adjacent sliding plate (1505) is fixedly connected to a connecting member (1702), the connecting member (1702) is rotatably connected to a first rotating member (1703), the first rotating member (1703) is fixedly connected to the adjacent sliding plate (1505), the back sides of the two first rotating members (1703) are both fixedly connected to a first limiting plate (1704), the first rotating member (1703) is 03) and the adjacent connecting member (1702) are fixedly connected with a symmetrically arranged first elastic element (1705), and the cover shell (1404) is fixedly connected with a symmetrically arranged second limiting plate (1706), and the second limiting plate (1706) is limitedly matched with the adjacent first limiting plate (1704), and the opposite sides of the symmetrically arranged second limiting plates (1706) are provided with a straight surface and an inclined surface, and the outer side of the cover shell (1404) is provided with a transmission component for making the two first sliding rods (1701) respectively move relative to the adjacent vertical plates (1501).

7. A MBR membrane bioreactor according to claim 6, characterized in that: The transmission assembly includes two second sliding bars (1801), both of which are slidably connected to the outer side of the cover (1404), the second sliding bars (1801) are fixedly connected to the adjacent second sliding bars (1503), one end of the second sliding bar (1801) close to the adjacent first sliding bar (1701) is fixedly connected to a first limiting member (1802), the cover (1404) is fixedly connected to a symmetrically arranged first limiting block (1803), one end of the first sliding bar (1701) close to the adjacent second sliding bar (1801) is rotatably connected to a second rotating member (1804), and the second rotating member (1804) is fixedly connected to the adjacent second sliding bar (1801). A second limiting member (1805) is fixedly connected to one side of the adjacent second sliding bar (1801), and the second limiting member (1805) cooperates with the adjacent first limiting member (1802) in a limiting manner. Second limiting blocks (1806) are fixedly connected to the opposite sides of the two second rotating members (1804), and the second limiting blocks (1806) cooperate with the adjacent first limiting blocks (1803) in a limiting manner. A second elastic element (1807) is fixedly connected between the second rotating member (1804) and the adjacent first sliding bar (1701), and a third elastic element (1808) is fixedly connected between the first sliding bar (1701) and the cover shell (1404).

8. The MBR membrane bioreactor according to claim 7, characterized in that: The first limiting member (1802) and the second limiting member (1805) are both provided with an annular array of inclined surfaces, which are used to enable the first limiting member (1802) to rotate relative to the adjacent second limiting member (1805).

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